Severe Thunderstorm Warning 40, NWS New Orleans, LA

Issued

Mar 9, 2001, 1:55 AM CST (07:55 UTC)

Expired

Mar 9, 2001, 3:00 AM CST

In force

65 min

Issued by

NWS New Orleans, LA

Area

Whole counties; the outline is the Mesonet’s reconstruction

Counties Assumption Parish, LA, Lafourche Parish, LA, Terrebonne Parish, LA

000 
WUUS54 KLIX 090759
SVRNEW
LAC007-057-109-090900-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
155 AM CST FRI MAR 9 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ASSUMPTION PARISH IN SOUTHEAST LOUISIANA
  WESTERN LAFOURCHE PARISH IN SOUTHEAST LOUISIANA
  TERREBONNE PARISH IN SOUTHEAST LOUISIANA

* UNTIL 300 AM CST

* AT 200 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
LINE OF SEVERE THUNDERSTORMS LOCATED WEST OF THE ATCHAFALAYA RIVER 
FROM ABOUT 10 MILES SOUTHWEST OF PIGEON TO THE ATCHAFALAYA BAY. 
THESE THUNDERSTORMS WERE MOVING TO THE EAST AT 40 MPH.

THE COMMUNITIES OF NAPOLEONVILLE...GIBSON...LABADIEVILLE...
AND THIBODAUX ARE IN THE PATH OF THESE SEVERE THUNDERSTORMS.

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. TAKE COVER
IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE.

LAT...LON 2970 9153 2954 9150 2912 9055 2989 9069
          2993 9112

NWS New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 8, 9:55 PM CST, 4 hours earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA
955 PM CST THU MAR 8 2001

WILL BE UPDATING ZONES TO RAISE MIN TEMPS UP ABOUT 10 DEGREES AND TO
ALTER RAINFALL WORDING A BIT TO ACCOUNT FOR RAINFALL BEFORE
MIDNIGHT. ALSO WILL ADJUST FIRST PERIOD WINDS.

THE 00Z ANALYSES SHOW 100-125 KT JET STREAM OVER LA WITH MAX
DIVERGENCE FEATURE OVER EXTREME SE TX...AS INDICATIVE BY V-PATTERN
ENHANCEMENT ON IR LOOP IN THE VICINITY OF GALVESTON BAY. SPEED TOOL
INDICATES A SE MOVEMENT 25 KT WITH THE SHARP BACK EDGE OF THE SQUALL
LINE ACROSS E TX. PORTIONS OF THIS LINE HAVE HAD BOW ECHO AND LEWP
CHARACTERISTICS WHILE APPROACHING HOUSTON METRO AREA. THE SURFACE
LOW IS NEAR GALVESTON BAY...OR ALONG THE I-10 CORRIDOR...WHILE THE
H50 LOW IS MOVING ACROSS THE DALLAS METROPLEX...ALONG THE I-20
CORRIDOR. BEST HEIGHT FALLS ALOFT REMAIN ALONG I-20 INTO KSHV. COLD
POOL ALOFT PROVIDING A STEEPENING LAPSE RATE ACROSS THE AREA CAPABLE
OF MAINTAINING ELEVATED CONVECTION. EXPECT THE SURFACE LOW TO EMERGE
INTO THE NW GULF AND PRETTY MUCH CUT OFF AND SURFACE BASED RETURN.
WHILE THIS MAY SOFTEN ANY TORNADIC OR WIND THREAT...A VERY LOW WET
BULB ZERO HEIGHT WOULD SUGGEST CHANCES AT HAIL FROM THE STRONGER
CELLS. SEVERE HAIL DOES NOT SEEM LIKELY...BUT PEA TO MARBLE SIZE IS
POSSIBLE.

THE MESO-ETA SEEMS TOO FAST WITH THE SURFACE LOW PRES BOUNDARY BUT
IS INDICATING A DIGGING UPPER LEVEL LOW OVERNIGHT BEFORE FILLING
WHILE MOVING ACROSS OUR CWA. NONETHELESS...CURRENT POP FORECAST
SEEMS ON TRACK

UPDATE OUT SHORTLY.

.NEW...SMALL CRAFT ADVISORY COASTAL WATERS KPQL-K7R3.
LA...NONE.
MS...NONE.
24

Severe Thunderstorm Warnings in Louisiana, 2001Every severe thunderstorm warning in 2001

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.